Abstract Detail



Phylogenomics

Charboneau, Joseph [1], Cronn, Richard [2], Liston, A. [3], Wojciechowski, Martin [4], Sanderson, Michael [5].

Chloroplast phylogenomics in the New World clade of Astragalus L. (Fabaceae).

With over 3,000 described species, Astragalus L. (Fabaceae) is one of the largest genera of seed plants. A clade of about 450 species called Neo-Astragalus make up the majority of Astragalus species in the Americas. Neo-Astragalus is estimated to be only about 4.5 million years old, and although the monophyly of the clade itself is well supported, phylogenetic relationships within Neo-Astragalus have remained largely unknown due to low levels of sequence variation seen in genes sequenced thus far. Using genome skimming data, we assembled the chloroplast genomes of three Neo-Astragalus species: Astragalus agnicidus Barneby, Astragalus flexuosus (Hook.) Douglas ex G. Don, and Astragalus mollissimus Torr. The plastomes of the latter two species contained large inversions, and the presence of these inversions in other species may be useful in delimiting major groups within Neo-Astragalus. We screened for these inversions in other Neo-Astragalus species, and we have also sequenced genomic libraries of over 90 other Neo-Astragalus species, from which we are assembling additional chloroplast genomes.


1 - University Of Arizona, Department Of Ecology And Evolutionary Biology, 1041 E. Lowell St., Tucson, AZ, 85721, United States
2 - 3200 SW Jefferson Way, Corvallis, OR, 97330, United States
3 - Oregon State University, Department Of Botany & Plant Pathology, 2082 Cordley Hall, Corvallis, OR, 97331, United States
4 - Arizona State University, School Of Life Sciences, PO Box 874501, Tempe, AZ, 85287, United States
5 - University Of Arizona, Ecology And Evolutionary Biology, Tucson, AZ, 85749.0, United States

Keywords:
chloroplast genome.

Presentation Type: Oral Paper
Number:
Abstract ID:1055
Candidate for Awards:None


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